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- #include <iostream>
- #include <cmath>
- using namespace std;
- int Cnk(int n,int k)
- {
- if (k==0 || n==k) return 1;
- else
- return Cnk(n-1,k-1)+Cnk(n-1,k);
- }
- int main()
- {
- int n,k;
- cin>>n>>k;
- cout<<Cnk(n,k);
- }
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